238 research outputs found
Table_1_Comparison of treatment outcome between glucocorticoids and non-steroidal anti-inflammatory drugs in subacute thyroiditis patients—a systematic review and meta-analysis.docx
ImportanceSubacute thyroiditis (SAT) is a self-limiting and inflammatory thyroid disease. Although SAT usually improves on its own within weeks, it needs treatment when patients have pain, fever, and symptoms of thyrotoxicosis. Therapeutic drugs mainly include non-steroidal anti-inflammatory drugs (NSAIDs) and glucocorticoids. Currently, there is no systematic review or meta-analysis of the comparison of outcomes between NSAIDs and glucocorticoids for the treatment of SAT.ObjectivesTo conduct a systematic review and meta-analysis on the outcomes in subacute thyroiditis patients treated with glucocorticoids or NSAIDs.Data sourcesUsing the four electronic databases, including PubMed, Embase, Cochrane Library, Wanfang database and Web of Science. All publications until 21 June 2023 were searched. The reference lists of all selected articles were independently screened to identify additional studies left out in the initial search.Study selectionThe literature comparing outcomes between glucocorticoids and non-steroidal anti-inflammatory drugs for patients with subacute thyroiditis will be included.Data extraction and synthesisTwo independent investigators (Anqi Yuan and Jialu Wu) extracted the data following Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines (PRISMA) and then evaluated the quality of the eligible studies with the Newcastle-Ottawa Scale. Fixed-effects models for the meta-analyses were applied. Heterogeneity was assessed with the chi-squared (x²) test (Cochran’s Q) and inconsistency index (I²). The robustness of the results was tested with the sensitivity analyses. The bias of publication was assessed with the Harbord test.Main outcomes and measuresThe incidence of permanent hypothyroidism in SAT patients treated with corticosteroids or NSAIDs.ResultsOur study included a total of ten comparative cohort studies with 1337 participants. We found that the incidence of developing permanent hypothyroidism in the SAT patients who received glucocorticoids treatment was significantly lower than those who received NSAIDs treatment. (OR, 0.56; 95% CI, 0.36–0.88; P = 0.01). The risk of permanent hypothyroidism in patients who received prednisone at an average initial dose Conclusions and relevanceIn this meta-analysis, we compared the treatment outcomes of SAT patients between glucocorticoids and NSAIDs. Our results indicated that glucocorticoid treatment was associated with a lower incidence of permanent hypothyroidism than NSAID treatment. Patients treated with NSAIDs might have a lower recurrence rate. This finding might help to understand the outcome of the disease when choosing different drugs and help physicians to make appropriate decisions.Systematic review registrationhttps://www.crd.york.ac.uk/prospero/, identifier CRD42023427332.</p
Immunological Evidence for the Role of Mycobacteria in Sarcoidosis: A Meta-Analysis
<div><p>Background</p><p>Sarcoidosis is a granulomatous disease, the etiology of which is currently unknown. The role of mycobacteria in the etiology of sarcoidosis has been extensively investigated. In this meta-analysis, we assessed the immunological evidence of the possible role of mycobacteria in the pathogenesis and development of sarcoidosis.</p><p>Methods</p><p>We performed a systematic search of relevant articles from PubMed, Embase and Cochrane Library databases published between January 1990 and October 2015. Data extracted from the articles were analyzed with Review Manager 5.3 (Cochrane Collaboration, Oxford, UK).</p><p>Results</p><p>In this meta-analysis, 13 case-control studies (733 participants) were considered eligible according to our criteria. Methodological quality was assessed using the Newcastle-Ottawa Scale (NOS). The positivity incidence of the immune response (either the cell-mediated response or humoral response) in sarcoidosis patients was significantly higher than that in controls, as determined using fixed-effects model. The odds ratio (OR) of the positivity incidence of T-cell response in the patients with sarcoidosis versus the controls with PPD- or unknown PPD status was 5.54 (95% CI 3.56–8.61); the ORs were 16.70 (95% CI 8.19–34.08) and 1.48 (95% CI 0.74–2.96) for the two subgroups with PPD- controls and unknown PPD status respectively. However, the OR of the positivity incidence in patients with sarcoidosis versus PPD+ controls (latent tuberculosis infection; LTBI) was 0.26 (95% 0.10–0.66). Regarding the humoral response, pooled analysis of the positivity incidence revealed an OR (95%CI) of 20.43 (5.53–75.53) for the patients with sarcoidosis versus controls; the ORs were 11.93 (95% CI 2.15–66.27) and 41.97 (95% CI 5.24–336.15) in two subgroups of controls with PPD- and unknown PPD statuses respectively. Data on heterogeneity and evidence of publication bias were examined.</p><p>Conclusions</p><p>This meta-analysis confirmed the existence of an association between mycobacteria (especially <i>M</i>.<i>tuberculosis</i>) and sarcoidosis. The current available evidence indicates that some insoluble mycobacterial antigens that preferentially within the body are involved in the pathogenesis of sarcoidosis rather than the whole mycobacteria and that they elicit a type IV immune response.</p></div
Funnel plot assessing publication bias.
<p><b>a. Funnel plot for the studies on the T-cell response to <i>M</i>. <i>tuberculosis</i> antigens with controls of PPD- or unknown PPD status; b. Funnel plot for the studies on the T-cell response to <i>M</i>. <i>tuberculosis</i> antigens with PPD+ controls; c. Funnel plot for studies on the humoral response to <i>M</i>. <i>tuberculosis</i> antigens</b>. SA = sarcoidosis.</p
Forest plot of trials analyzing the positivity incidence of T-cell response to <i>M</i>. <i>tuberculosis</i> antigens in sarcoidosis patients versus PPD+ controls (LTBI).
<p>LTBI = latent tuberculosis infection.</p
Flow diagram of assessment of studies identified in meta-analysis.
<p>Flow diagram of assessment of studies identified in meta-analysis.</p
The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomized studies.
<p>The Newcastle-Ottawa Scale (NOS) for assessing the quality of nonrandomized studies.</p
Forest plot of trials analyzing the positivity incidence of the humoral response to <i>M</i>. <i>tuberculosis</i> antigens in sarcoidosis patients versus controls.
<p>Forest plot of trials analyzing the positivity incidence of the humoral response to <i>M</i>. <i>tuberculosis</i> antigens in sarcoidosis patients versus controls.</p
High-Energy Density Redox Flow Lithium Battery with Unprecedented Voltage Efficiency
A redox
flow lithium battery (RFLB) has decoupled energy storage
and power generation units like a conventional redox flow battery,
while it stores energy in solid materials by virtue of the unique
redox targeting concept. Hence, it presents superior energy density
and represents a promising approach for large-scale energy storage.
In a RFLB, the potential difference between the redox shuttle molecules
used in the same electrolyte normally brings about an intrinsic voltage
hysteresis, resulting in a compromised voltage efficiency of the battery.
Here we report a novel redox shuttle molecule pair to minimize the
voltage hysteresis: anatase TiO<sub>2</sub> is reduced by bisÂ(pentamethylcyclopentadienyl)Âchromium
(CrCp*<sub>2</sub>), while Li<sub><i>x</i></sub>TiO<sub>2</sub> is oxidized by cobaltocene (CoCp<sub>2</sub>). The potential
difference between CoCp<sub>2</sub> and CrCp*<sub>2</sub> is only
0.15 V. A redox flow lithium battery is successfully demonstrated
with an unprecedented voltage efficiency of 84%. The RFLB shows good
cycling stability, and >90% Coulombic efficiency was demonstrated
in the first 50 cycles
Dual Role of Alkynyl Bromides in One-Step Synthesis of Bromo-Substituted Alkynyl Sulfides
<div><p></p><p>An atom-economical and environmentally friendly method for synthesis of bromo-substituted alkynyl sulfides has been developed. In the absence of any additive, alkynyl bromides could react with tetrahydrothiophene to give bromo-substituted alkynyl sulfides in moderate to perfect yields.</p>
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Graphical Principal Component Analysis of Multivariate Functional Time Series
In this paper, we consider multivariate functional time series with a two-way dependence structure: a serial dependence across time points and a graphical interaction among the multiple functions within each time point. We develop the notion of dynamic weak separability, a more general condition than those assumed in literature, and use it to characterize the two-way structure in multivariate functional time series. Based on the proposed weak separability, we develop a unified framework for functional graphical models and dynamic principal component analysis, and further extend it to optimally reconstruct signals from contaminated functional data using graphical-level information. We investigate asymptotic properties of the resulting estimators and illustrate the effectiveness of our proposed approach through extensive simulations. We apply our method to hourly air pollution data that were collected from a monitoring network in China.</p
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